Dynamics of reversible protein phosphorylation in thylakoids of flowering plants: the roles of STN7, STN8 and TAP38
Articolo
Data di Pubblicazione:
2011
Citazione:
Dynamics of reversible protein phosphorylation in thylakoids of flowering plants: the roles of STN7, STN8 and TAP38 / P. Pesaresi, M. Pribil, T. Wunder, D. Leister. - In: BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS. - ISSN 0005-2728. - 1807:8(2011), pp. 887-896.
Abstract:
Phosphorylation is the most common post-translational modification found in thylakoid membrane proteins of flowering plants, targeting more than two dozen subunits of all multiprotein complexes, including some light-harvesting proteins. Recent progress in mass spectrometry-based technologies has led to the detection
of novel low-abundance thylakoid phosphoproteins and localised their phosphorylation sites. Three of the
enzymes involved in phosphorylation/dephosphorylation cycles in thylakoids, the protein kinases STN7 and
STN8 and the phosphatase TAP38/PPH1, have been characterised in the model species Arabidopsis thaliana.
Differential protein phosphorylation is associated with changes in illumination and various other environmental parameters, and has been implicated in several acclimation responses, the molecular mechanisms of which are only partly understood. The phenomenon of State Transitions, which enables rapid
adaptation to short-term changes in illumination, has recently been shown to depend on reversible phosphorylation of LHCII by STN7-TAP38/PPH1. STN7 is also necessary for long-term acclimation responses
that counteract imbalances in energy distribution between PSII and PSI by changing the rates of accumulation of their reaction-centre and light-harvesting proteins. Another aspect of photosynthetic
acclimation, the modulation of thylakoid ultrastructure, depends on phosphorylation of PSII core proteins, mainly executed by STN8. Here we review recent advances in the characterisation of STN7, STN8 and TAP38/
PPH1, and discuss their physiological significance within the overall network of thylakoid protein phosphorylation.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Acclimation ; Photosynthesis ; Regulation ; State transitions
Elenco autori:
P. Pesaresi, M. Pribil, T. Wunder, D. Leister
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